313 lines
8.4 KiB
C
313 lines
8.4 KiB
C
/* $NetBSD: kvm_m68k_cmn.c,v 1.2 1997/04/09 21:15:55 thorpej Exp $ */
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/*-
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* Copyright (c) 1997 Jason R. Thorpe. All rights reserved.
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* Copyright (c) 1989, 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software developed by the Computer Systems
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* Engineering group at Lawrence Berkeley Laboratory under DARPA contract
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* BG 91-66 and contributed to Berkeley.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char sccsid[] = "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93";
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#else
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static char *rcsid = "$NetBSD: kvm_m68k_cmn.c,v 1.2 1997/04/09 21:15:55 thorpej Exp $";
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#endif
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#endif /* LIBC_SCCS and not lint */
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/*
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* Common m68k machine dependent routines for kvm.
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*
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* Note: This file has to build on ALL m68k machines,
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* so do NOT include any <machine/*.h> files here.
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*/
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#include <sys/types.h>
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#include <sys/kcore.h>
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#include <unistd.h>
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#include <limits.h>
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#include <nlist.h>
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#include <kvm.h>
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#include <db.h>
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#include <m68k/cpu.h>
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#include <m68k/kcore.h>
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#include "kvm_private.h"
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#include "kvm_m68k.h"
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int _kvm_cmn_initvtop __P((kvm_t *));
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void _kvm_cmn_freevtop __P((kvm_t *));
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int _kvm_cmn_kvatop __P((kvm_t *, u_long, u_long *));
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off_t _kvm_cmn_pa2off __P((kvm_t *, u_long));
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struct kvm_ops _kvm_ops_cmn = {
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_kvm_cmn_initvtop,
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_kvm_cmn_freevtop,
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_kvm_cmn_kvatop,
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_kvm_cmn_pa2off };
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static int vatop_030 __P((kvm_t *, u_int32_t, u_long, u_long *));
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static int vatop_040 __P((kvm_t *, u_int32_t, u_long, u_long *));
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#define _kvm_btop(v, a) (((unsigned)(a)) >> (v)->pgshift)
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#define KREAD(kd, addr, p)\
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(kvm_read(kd, addr, (char *)(p), sizeof(*(p))) != sizeof(*(p)))
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void
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_kvm_cmn_freevtop(kd)
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kvm_t *kd;
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{
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/* No private state information to keep. */
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}
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int
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_kvm_cmn_initvtop(kd)
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kvm_t *kd;
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{
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/* No private state information to keep. */
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return (0);
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}
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int
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_kvm_cmn_kvatop(kd, va, pa)
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kvm_t *kd;
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u_long va;
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u_long *pa;
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{
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cpu_kcore_hdr_t *h = kd->cpu_data;
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struct m68k_kcore_hdr *m = &h->un._m68k;
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struct vmstate *vm = kd->vmst;
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int (*vtopf) __P((kvm_t *, u_int32_t, u_long, u_long *));
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if (ISALIVE(kd)) {
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_kvm_err(kd, 0, "vatop called in live kernel!");
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return (0);
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}
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/*
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* 68040 and 68040 use same translation functions,
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* as do 68030, 68851, HP MMU.
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*/
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if (m->mmutype == MMU_68040 || m->mmutype == MMU_68060)
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vtopf = vatop_040;
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else
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vtopf = vatop_030;
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return ((*vtopf)(kd, m->sysseg_pa, va, pa));
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}
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/*
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* Translate a physical address to a file-offset in the crash-dump.
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*/
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off_t
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_kvm_cmn_pa2off(kd, pa)
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kvm_t *kd;
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u_long pa;
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{
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cpu_kcore_hdr_t *h = kd->cpu_data;
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struct m68k_kcore_hdr *m = &h->un._m68k;
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phys_ram_seg_t *rsp;
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off_t off;
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int i;
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off = 0;
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rsp = m->ram_segs;
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for (i = 0; i < M68K_NPHYS_RAM_SEGS && rsp[i].size != 0; i++) {
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if (pa >= rsp[i].start &&
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pa < (rsp[i].start + rsp[i].size)) {
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pa -= rsp->start;
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break;
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}
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off += rsp->size;
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}
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return (kd->dump_off + off + pa);
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}
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/*****************************************************************
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* Local stuff...
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*/
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static int
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vatop_030(kd, stpa, va, pa)
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kvm_t *kd;
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u_int32_t stpa;
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u_long va;
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u_long *pa;
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{
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cpu_kcore_hdr_t *h = kd->cpu_data;
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struct m68k_kcore_hdr *m = &h->un._m68k;
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struct vmstate *vm = kd->vmst;
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u_long addr;
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u_int32_t ste, pte;
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u_int p, offset;
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offset = va & vm->pgofset;
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/*
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* We may be called before address translation is initialized.
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* This is typically used to find the dump magic number. This
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* means we do not yet have the kernel page tables available,
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* so we must to a simple relocation.
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*/
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if (va < m->relocend) {
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*pa = (va - h->kernbase) + m->reloc;
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return (h->page_size - offset);
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}
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addr = stpa + ((va >> m->sg_ishift) * sizeof(u_int32_t));
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/*
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* Can't use KREAD to read kernel segment table entries.
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* Fortunately it is 1-to-1 mapped so we don't have to.
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*/
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if (stpa == m->sysseg_pa) {
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if (lseek(kd->pmfd, _kvm_cmn_pa2off(kd, addr), 0) == -1 ||
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read(kd->pmfd, (char *)&ste, sizeof(ste)) < 0)
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goto invalid;
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} else if (KREAD(kd, addr, &ste))
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goto invalid;
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if ((ste & m->sg_v) == 0) {
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_kvm_err(kd, 0, "invalid segment (%x)", ste);
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return(0);
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}
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p = _kvm_btop(vm, va & m->sg_pmask);
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addr = (ste & m->sg_frame) + (p * sizeof(u_int32_t));
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/*
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* Address from STE is a physical address so don't use kvm_read.
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*/
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if (lseek(kd->pmfd, _kvm_cmn_pa2off(kd, addr), 0) == -1 ||
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read(kd->pmfd, (char *)&pte, sizeof(pte)) < 0)
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goto invalid;
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addr = pte & m->pg_frame;
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if ((pte & m->pg_v) == 0) {
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_kvm_err(kd, 0, "page not valid");
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return (0);
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}
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*pa = addr + offset;
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return (h->page_size - offset);
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invalid:
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_kvm_err(kd, 0, "invalid address (%x)", va);
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return (0);
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}
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static int
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vatop_040(kd, stpa, va, pa)
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kvm_t *kd;
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u_int32_t stpa;
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u_long va;
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u_long *pa;
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{
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cpu_kcore_hdr_t *h = kd->cpu_data;
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struct m68k_kcore_hdr *m = &h->un._m68k;
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struct vmstate *vm = kd->vmst;
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u_long addr;
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u_int32_t stpa2;
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u_int32_t ste, pte;
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u_int p, offset;
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offset = va & vm->pgofset;
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/*
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* We may be called before address translation is initialized.
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* This is typically used to find the dump magic number. This
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* means we do not yet have the kernel page tables available,
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* so we must to a simple relocation.
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*/
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if (va < m->relocend) {
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*pa = (va - h->kernbase) + m->reloc;
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return (h->page_size - offset);
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}
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addr = stpa + ((va >> m->sg40_shift1) * sizeof(u_int32_t));
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/*
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* Can't use KREAD to read kernel segment table entries.
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* Fortunately it is 1-to-1 mapped so we don't have to.
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*/
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if (stpa == m->sysseg_pa) {
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if (lseek(kd->pmfd, _kvm_cmn_pa2off(kd, addr), 0) == -1 ||
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read(kd->pmfd, (char *)&ste, sizeof(ste)) < 0)
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goto invalid;
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} else if (KREAD(kd, addr, &ste))
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goto invalid;
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if ((ste & m->sg_v) == 0) {
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_kvm_err(kd, 0, "invalid level 1 descriptor (%x)",
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ste);
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return((off_t)0);
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}
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stpa2 = (ste & m->sg40_addr1);
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addr = stpa2 + (((va & m->sg40_mask2) >> m->sg40_shift2) *
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sizeof(u_int32_t));
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/*
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* Address from level 1 STE is a physical address,
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* so don't use kvm_read.
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*/
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if (lseek(kd->pmfd, _kvm_cmn_pa2off(kd, addr), 0) == -1 ||
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read(kd->pmfd, (char *)&ste, sizeof(ste)) < 0)
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goto invalid;
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if ((ste & m->sg_v) == 0) {
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_kvm_err(kd, 0, "invalid level 2 descriptor (%x)",
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ste);
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return((off_t)0);
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}
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stpa2 = (ste & m->sg40_addr2);
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addr = stpa2 + (((va & m->sg40_mask3) >> m->sg40_shift3) *
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sizeof(u_int32_t));
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/*
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* Address from STE is a physical address so don't use kvm_read.
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*/
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if (lseek(kd->pmfd, _kvm_cmn_pa2off(kd, addr), 0) == -1 ||
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read(kd->pmfd, (char *)&pte, sizeof(pte)) < 0)
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goto invalid;
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addr = pte & m->pg_frame;
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if ((pte & m->pg_v) == 0) {
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_kvm_err(kd, 0, "page not valid");
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return (0);
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}
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*pa = addr + offset;
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return (h->page_size - offset);
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invalid:
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_kvm_err(kd, 0, "invalid address (%x)", va);
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return (0);
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}
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